Menus in svdem

As I promised yesterday, I implemented menus. Click on the image to get full view of my
current
svdem
from
svtools
.
Of course there are issues :-) Menus probably do not work for more windows properly, no separators,
no checkboxes, no shortcuts, no events. I certainly forgot something. But it looks nice now ;-)
I hope I'll find some more time next days to continue.